// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_OZONE_PLATFORM_DRM_HOST_DRM_WINDOW_HOST_H_
#define UI_OZONE_PLATFORM_DRM_HOST_DRM_WINDOW_HOST_H_

#include <stdint.h>

#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "ui/display/types/display_snapshot.h"
#include "ui/events/platform/platform_event_dispatcher.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/ozone/platform/drm/host/gpu_thread_observer.h"
#include "ui/platform_window/platform_window.h"

namespace ui {

class DrmDisplayHostManager;
class DrmCursor;
class DrmGpuWindow;
class DrmOverlayManager;
class DrmWindowHostManager;
class EventFactoryEvdev;
class GpuThreadAdapter;

// Implementation of the platform window. This object and its handle |widget_|
// uniquely identify a window. Since the DRI/GBM platform is split into 2
// pieces (Browser process and GPU process), internally we need to make sure the
// state is synchronized between the 2 processes.
//
// |widget_| is used in both processes to uniquely identify the window. This
// means that any state on the browser side needs to be propagated to the GPU.
// State propagation needs to happen before the state change is acknowledged to
// |delegate_| as |delegate_| is responsible for initializing the surface
// associated with the window (the surface is created on the GPU process).
class DrmWindowHost : public PlatformWindow,
                      public PlatformEventDispatcher,
                      public GpuThreadObserver {
public:
    DrmWindowHost(PlatformWindowDelegate* delegate,
        const gfx::Rect& bounds,
        GpuThreadAdapter* sender,
        EventFactoryEvdev* event_factory,
        DrmCursor* cursor,
        DrmWindowHostManager* window_manager,
        DrmDisplayHostManager* display_manager,
        DrmOverlayManager* overlay_manager);
    ~DrmWindowHost() override;

    void Initialize();

    gfx::AcceleratedWidget GetAcceleratedWidget();

    gfx::Rect GetCursorConfinedBounds() const;

    // PlatformWindow:
    void Show() override;
    void Hide() override;
    void Close() override;
    void SetBounds(const gfx::Rect& bounds) override;
    gfx::Rect GetBounds() override;
    void SetTitle(const base::string16& title) override;
    void SetCapture() override;
    void ReleaseCapture() override;
    void ToggleFullscreen() override;
    void Maximize() override;
    void Minimize() override;
    void Restore() override;
    void SetCursor(PlatformCursor cursor) override;
    void MoveCursorTo(const gfx::Point& location) override;
    void ConfineCursorToBounds(const gfx::Rect& bounds) override;
    PlatformImeController* GetPlatformImeController() override;

    // PlatformEventDispatcher:
    bool CanDispatchEvent(const PlatformEvent& event) override;
    uint32_t DispatchEvent(const PlatformEvent& event) override;

    // GpuThreadObserver:
    void OnGpuThreadReady() override;
    void OnGpuThreadRetired() override;

private:
    void SendBoundsChange();

    PlatformWindowDelegate* delegate_; // Not owned.
    GpuThreadAdapter* sender_; // Not owned.
    EventFactoryEvdev* event_factory_; // Not owned.
    DrmCursor* cursor_; // Not owned.
    DrmWindowHostManager* window_manager_; // Not owned.
    DrmDisplayHostManager* display_manager_; // Not owned.
    DrmOverlayManager* overlay_manager_; // Not owned.

    gfx::Rect bounds_;
    gfx::AcceleratedWidget widget_;

    gfx::Rect cursor_confined_bounds_;

    DISALLOW_COPY_AND_ASSIGN(DrmWindowHost);
};

} // namespace ui

#endif // UI_OZONE_PLATFORM_DRM_HOST_DRM_WINDOW_HOST_H_
